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https://gitlab.com/kicad/code/kicad.git
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e2bc7557cc
1) For a while now we've been using a calculated seg count from a given maxError, and a correction factor to push the radius out so that all the error is outside the arc/circle. However, the second calculation (which pre-dates the first) is pretty much just the inverse of the first (and yields nothing more than maxError back). This is particularly sub-optimal given the cost of trig functions. 2) There are a lot of old optimizations to reduce segcounts in certain situations, someting that our error-based calculation compensates for anyway. (Smaller radii need fewer segments to meet the maxError condition.) But perhaps more importantly we now surface maxError in the UI and we don't really want to call it "Max deviation except when it's not". 3) We were also clamping the segCount twice: once in the calculation routine and once in most of it's callers. Furthermore, the caller clamping was inconsistent (both in being done and in the clamping value). We now clamp only in the calculation routine. 4) There's no reason to use the correction factors in the 3Dviewer; it's just a visualization and whether the polygonization error is inside or outside the shape isn't really material. 5) The arc-correction-disabling stuff (used for solder mask layer) was somewhat fragile in that it depended on the caller to turn it back on afterwards. It's now only exposed as a RAII object which automatically cleans up when it goes out of scope. 6) There were also bugs in a couple of the polygonization routines where we'd accumulate round-off error in adding up the segments and end up with an overly long last segment (which of course would voilate the error max). This was the cause of the linked bug and also some issues with vias that we had fudged in the past with extra clearance. Fixes https://gitlab.com/kicad/code/kicad/issues/5567
77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file create_layer_poly.cpp
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* @brief This file implements the creation of the pcb board items in the poly
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* contours format.
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*/
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#include "board_adapter.h"
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#include <convert_basic_shapes_to_polygon.h>
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#include <class_edge_mod.h>
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#include <class_module.h>
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void BOARD_ADAPTER::buildPadShapeThickOutlineAsPolygon( const D_PAD* aPad,
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SHAPE_POLY_SET& aCornerBuffer,
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int aWidth ) const
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{
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if( aPad->GetShape() == PAD_SHAPE_CIRCLE ) // Draw a ring
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{
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TransformRingToPolygon( aCornerBuffer, aPad->ShapePos(), aPad->GetSize().x / 2,
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ARC_HIGH_DEF, aWidth );
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return;
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}
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// For other shapes, add outlines as thick segments in polygon buffer
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const std::shared_ptr<SHAPE_POLY_SET>& corners = aPad->GetEffectivePolygon();
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const SHAPE_LINE_CHAIN& path = corners->COutline( 0 );
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for( int ii = 0; ii < path.PointCount(); ++ii )
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{
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const VECTOR2I& a = path.CPoint( ii );
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const VECTOR2I& b = path.CPoint( ii + 1 );
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TransformOvalToPolygon( aCornerBuffer, (wxPoint) a, (wxPoint) b, aWidth, ARC_HIGH_DEF );
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}
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}
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void BOARD_ADAPTER::transformGraphicModuleEdgeToPolygonSet( const MODULE *aModule,
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PCB_LAYER_ID aLayer,
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SHAPE_POLY_SET& aCornerBuffer ) const
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{
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for( BOARD_ITEM* item : aModule->GraphicalItems() )
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{
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if( item->Type() == PCB_MODULE_EDGE_T )
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{
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EDGE_MODULE* outline = (EDGE_MODULE*) item;
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if( outline->GetLayer() == aLayer )
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outline->TransformShapeWithClearanceToPolygon( aCornerBuffer, aLayer, 0 );
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}
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}
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}
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